Heat pump



FIG. 1 is a perspective view of a heat pump embodying my new design;

FIG. 2 is a left side elevational view of the heat pump as shown in FIG. 1 on a reduced scale;

FIG. 3 is a rear elevational view of the heat pump as shown in FIG. 1 on a reduced scale;

FIG. 4 is a top plan view of the heat pump as seen in FIG. 1 on a reduced scale; and,

FIG. 5 is a bottom plan view of the heat pump as shown in FIG. 1, on a reduced scale.

The screen pattern fragmentarily shown in FIG. 1, is understood to extend uniformly throughout the area represented. 

The ornamental design for a heat pump, as shown and described. 